The way to do it would be to structure it as a two year OS with the first year as 6 million dollars and the second year as 9.75 million. That way if they match they are stuck with a poison pill qualifying offer in two years (when they will really need the cap space) and you would only lose a 1st, a 2nd, and a 3rd if they choose not to match it. It would suck having to qualify him yourself in two years but getting him for such a discounted price would make it worth it I think.
I don’t see him signing it though, Toronto is a great place to be right now. Only way I could see it is if he wants to be a Center, because if he signs for the next 8 years in Toronto he’s basically accepting that he’s a career winger.